A stranger, looking for his friend, stays the night in a remote, run-down roadside motel, but a Horror violently kills him. Meanwhile Sword, Sophie and Gina drive through another ruined and rough western town. They arrive at the same motel where they decide to stay after days of sleeping rough. While there, Sophie meets a teenage boy, George, the lonely son of the owner Matthew and his wife. As Gina and Sophie take a bath, a liquid-based Horror attacks them, but Gina drives it off. Later, Matthew's wife discovers that her husband made a pact with the Horror to ensure the family's financial survival. Matthew wishes to return to Russell City and become a success, but instead, the Horror engulfs him and then attacks his wife. She is saved by Sword who, together with Gina, attacks and destroys the Horror. Before moving on, Gina rewrites wife and son's memories to eliminate their experience, believing instead that a tornado caused the destruction and Matthew's death.

Gina suggests that they visit Ferre Salé Dessimo, a Makai Alchemist village in the Land of Guidance, to get more information about El Dorado. They arrive at a modest settlement built on islands of woven reeds on a lake in the mountains, where an elder tells them that El Dorado has become a problem. Gina, Sword and Sophie travel to the Land of Guidance and enter the temple that only appears on a full moon. Gina undergoes the trial, defeating wolves and a monster then receives a ruby colored gem. She is also told of the powerful ring possessed by the king of El Dorado, a place which lies beyond El Sanvados to the southwest. As they set off, Gina gives the gem to Sophie.

Luke arrives in a town after being sent by the Land of Guidance and visits an old man and his granddaughter Stella with a Makai Alchemist symbol on their door. Stella, an avid researcher of the occult, tells him the legend of a Demon Sealer who sealed a demon nearby many years ago. Apparently the seal has weakened and the demon is about to awaken with the impending full moon. They take him to the place where a statue of the Demon Sealer once stood and with Luke's help, locate a sea cave where the demon was sealed. Luke identifies it as a Knight that became a Horror. The next night, Luke goes to the cave to prevent the Horror from reappearing and Stella follows him. The powerful Horror awakes and Luke tries to fight him with all the weapons at his disposal, including the spirits of those the demon defeated in the past and he manages to destroy it. As he leaves, Luke wipes their memories of the previous night's events.

Five bus-loads of young people, the chosen ones, head into El Dorado hoping to fulfill their dreams. Meanwhile a Horror, Bezel, has infiltrated El Dorado and walks the streets looking for King, consuming humans along the way, however his presence is detected by Bishop. One of the chosen ones, a young girl accepts a free invitation to an exclusive party, but she find that it's an trap to provide food for the resident Horrors. Bezel interrupts their feast and kills them all, although he is observed remotely by Bishop and Queen. Bezel approaches King's golden tower where he challenges Queen. He splits into multiple clones, however Queen is prepared and easily disposes of them and she defeats Bezel. He survives and just manages to escape with his life, only to be destroyed moments later by Knight.

Sword, Gina and Sophie arrive at a seaside town, but Sophie is angry at Sword for eating her chocolate without permission. During the day, Sword saves a boy named Pedro from some thugs whom he blames for the death of his girlfriend Monica. Pedro ask for Sword's help but Sword refuses as he recalls the death of his own sister in an explosion the research facility of Signa Slam Tech and the fruitlessness of revenge. Pedro again gets beaten up, and Sword again rescues him, chasing off the bully. As they prepare to leave the town, Sword gives Sophie a present of chocolate and her anger dissipates.

As Sword, Gina and Sophie approach El Sanvados, they are confronted by a battalion of Horror bikers. Sword attacks them, sending Gina and Sophie ahead by another route in the car. However Bishop sets up a Horror Barrier darkening the sky, and follows Gina and Sophie with a wave of flying Horrors. They are almost caught, but Luke arrives just in time, destroying the Horrors and breaking the barrier. Suddenly a new monster emerges from below the ground and captures Sophie just as Sword arrives on his motorcycle. Sword rescues Sophie and then Zaruba carries her away to safety on the motorcycle. Sophie is distressed at the trouble that she has caused her companions, but Zaruba tells her to keep moving forward. When they are caught by Knight, Zaruba crashes the motorcycle into Knight, sacrificing himself. Sword, Gina and Luke catch up with Sophie and Luke absorbs the remaining power of the Madou ring in preparation for a showdown between the Makai Knights. However, after testing Sword's powers, Knight withdraws leaving Sophie and the others to mourn the loss of Zaruba.

Gina separates from the crew to restock her wares, but the remaining members finally enter El Dorado. Sophie wants to find her brother as soon as possible and thinks finding King may be the fastest way. In her search on ELDO NET, she meets a clown...

Sword, Luke, and Sophie prepare to raid the GarEden Corporation only to find out they are too late, the true El Dorado has reached completion. They rush in, knowing full well that their enemies are waiting for them within. Waiting for Sophie.

Sophie finally reunites with her brother, but something is wrong. In his mind, she's still a 10 year old girl and the things he says doesn't match what she knows. At the same time, Sword also meets someone from the past. An illusion? Or something else?

Sophie is heartbroken her brother is already a Horror. Martin finds out the truth about all the work he has been doing for Sophie. While Sword and the others rush to Sophie's side, Sophie searches for her unstable brother to finish things herself.

Sophie discovers that she was the trigger that King had prepared for her brother Martin, who carried no inner darkness within him. Now that King has taken over Martin's body, he moves forward and releases ELDO NET into the world.

Sword and Sophie go back into ELDO NET, determined to destroy the storage container that holds all the souls abducted by the system. Lizzy helps them on the inside, while Luke and Gina protect the duo from the forces on the outside.

King has been destroyed, but a few loose ends still need tying up. Per Sword's request, Luke erases Sophie's memory so that she can return to her normal life. Her days are peaceful, but in the back of her mind, Sophie knows she has lost something.